Slitting device



April 28, 1931. J. A. CAMERON SLIT'IING DEVICE Filed Sept. 7. 1929 avwentoz Patented Apr. 28, 1931 UNITED STA-res?- PATENT omce um A. cannon, or nnooxmm, NEW YORK, nssrer'ron r cums momma co:- runner BROOKLYN, new YORK, a conroaarron or raw "1on1;

Application filed September 7, 1929. Seriallio. 391,015.

This invention relates generally to slitting devices, and has more particularly reference to-score-cut slitting devices'to divide a web of flexible material into longitudinal sections.

One of the d-ifliculties encountered in the art of slittinga'web o'f flexible material the vibration, due to the high speedof-modern slitting machines, of slitting members. 1 The effect of such vibration is to cause, at times,

a chattering of the slitting eleinent with re-- spect to the'backing roller, a deviaticin of the cutter from a straight line and a reluctance of the cutting element to equal the high-speed of the flowing-web. These-diificulties can'be' 5 largely traced-to u'ndue heaviness, in proportion to other arts, of the slitting element, and the main 0 ject'and feature of the invention is to lessen the weight of the slitter mounting,'toinsure free rotation of the slitting element at high speeds while'at thesame time steadying said-element to thereby prevent it from leaving its straight path or trace.

In the accom anying drawings, the invention is disclose in a concrete and preferred as fo'rm'in whichz' Fig. 1 is a transverse sectional view.

through a backin roller and support for a slitting cutter, s owing-the latter and its carrier and cutter holder inele'vation; 39 Fig.- 2 is a fragmentary view in elevation lookin in the direction of arrow 2 of Fig.

. Fig. 3 tially onthe plane of line 3-3 of 1.

' 1 indicates a backing roller having a glasshard surface and 2 is a score-cutter coacting therewith. Said score-cutter is rotatably mounte'd'at 3 in cutter holder 4, which latter is pivotally supported at 5 on carrier 6. Carrier 6 is adjustably mounted on support 7, and by means of this latter, said support bein a rockshaft, the carrier is movable towar and awe from the backing. roller. It wi be observed that the cutter holder it carries the bearings indicated by 3 adjacent its upper end. Also that said cutter holder has what may be called an abutment surface, indicated at 8, which is substantially in the plane of slitting and on that side of bracket 11" and issecured t '12. Said bracket is pivotally supported. at

provided with a stop 17 to e is a sectional detail view substan is pivoted adjacent to its lower end and that the score-cutter that faces awayfrom. the:- backing roller. 9 indicates-a spring member exerting its thrust substantially in the direction-of aline (indicated by ;10) that passes through the centers ofthe backing roller and score' cutten'- This spring1 is mounted in a ereto by set-screw 13 .on' carrier 6 and is heldby a pivotally su ported bolt 14 and wing nut 15. It. will be m seen that the thrust of the spring member isdirectly' against abutment surface 78 and is substantially in the plane of slitting.

Preferably the cutter holder is a segmentalshape-piece of sheet material formed into' a cup like member and provided at its lower' end with a bushing 16 that rocks on pivot 5 ofthe carrier. Said bushing may be welded. to the sheet material member, and may be age pin 18 of 7 the carrier. As here shown, t e sheet materialmember is conviently' provided with pressed-out bearings 3 that receive anti-frie tion bearings 19, the inner race, 20, of which is rigidly connected to studs 21. 22 is a shaft,

here shown hollow, to the interior of which terior of this shaft is rigidl mounted scorecutter 2 and also two stea ying member 23 and 24 that clamp or clasp opposite sides of the score-cutter. Member 23 can conveniently be welded tothe shaft as indicated at 25, and member 24 can be in threaded engagement with the shaft so that, by adjustment, the score-cutter canbe adequately clamped. 5 If desired, a wick 26 leading from a water or oil receptacle can be led from the carrier u through an opening in the cutter holder. 1 is obvious that the feature requisite for the slitter holder can be obtained by the use of no thin-wall castings preferably made of a. metal combining-1i htness and strength sucn as an aluminum a1 oy. I

It will be seen from the foregoing, that the sprin member exerts its thrust very direct- 1?; 1y an also that the cutter holder is of very light construction and therefore does not cre-* ate a perceptible rebound; furthermore, shaft 22 is of ample proportions in relation to the thickness of the cutter, the steadyingmembers engage said cutter at a point well toward its periphery. and bearings 3 are spaced an appreciable distance apart.

The result of the above construction is that great steadiness of the cutter is obtained, and that said cutter is capable of rotating at very high speeds without rebound or vibration,

the direct thrust of the spring also tending to keep the cutter in a straight trace.

' I claim:

1. A slitting device including: a backing.

roller, a score-cutter to coact therewith, a cutter holder rotatably supporting the scorecutter, a carrier pivotally supporting the cutter holder, and a spring member, anchored on the carrier and exerting its thrust against the cutter holder substantially-in the direc-.

I tion of a line that passes through the centers of the backing roller and score-cutter, to urge said score-cutter toward the backing roller.'

2. A slitting device includingza backing roller, a score-cutter to coact therewith, a cut- -ter holder rotatably supporting the scorecutter, a carrier movable'toward and away from the backing roller and pivotally supporting the cutter holder, and a spring member, anchored on thecarrier and-exerting its thrust against the cutter holder substantially in the direction of a line that passes through the centers of the backing ro ler and scorecutter, to urge said score-cutter toward the backing roller.

3. A slitting device including: a backing roller, a score-cutter to coact therewith, a cutter holder rotatably supporting the scorecutter, a carrier movable toward and away from the backing roller, a pivotal supportat the upper end of the carrier on which the cutter holder is pivotally mounted, a spring member anchored on the carrier below the pivotal support and extending above the same into engagement with the cutter holder to thereby press the score-cutter-against the I having an abutment located in the plane of backing roller.-

4. A slitting device including: a backing roller, a rotatable score-cutter to coact therewith, a pivotally supported cutter holder slitting on that side of the score-cutter that faces away from the backing roller, a carrier, movable toward and away from the backin roller, to pivotally support the cutter holder, and a spring member anchored on the carrier to engage said abutment to thereby press the score-cutter against the backing roller.

5. A mounting for a slitting member, including: a cutter holder, ings on said cutter holder, a shaft rotatably mounted at each end in the bearings of said cutter holder, a slitting cutter mounted to rotate with the shaft, and steadying members also mounted to rotate with the shaft and clamping opposite-sides of the slitting cutter.

6. A mounting for a slitting member inspaced-apart bearh eluding: a cutter holder pivotally supported adjacent its lower end, spaced-apart bearings on said cutter holder, adjacent its upper end, a shaft rotatably mounted at each end in the bearings of said cutter holder, a scorecutter mounted to rotate with .the shaft, steadying members also mounted to rotate with the shaft and clamping opposite sides of the score-cutter, a rotatable backing roller to coact with the cutter, and a spring member to urge the score-cutter toward the backing roller.

7. A slitting device including: a backing roller,'a pivotally supported cutter holder, two spaced-apart bearings on the cutter holder, a rotatable score-cutter mounted in said bearings, a carrier, movable toward and away from the backing roller, to pivotally support the cutter holder, and a spring member anchored on the carrier, to press the score-cutter against the backing roller, located intermediate the bearings, substantially in the plane of slitting, and exerting its thrust against the cutter holder and in the direction of the backing roller.

8. A slitting device including: a backing roller, a rotatable score-cutter to coact therewith, a pivotally supported cutter holder having an abutment located in the plane of slitting on that side of the score-cutter that faces away from the backin movable toward and away rom the backing roller, to pivotally support the cutter holder spaced-apart bearings on the cutter holder to rotatably support the score-cutter therebetween, and a spring member anchored on the carrier to'engage said abutment to thereby press the score-cutter against the backing roller.

9. A slitting device including: a backing roller, a score-cutter to coact therewith, a cutter holder rotatably supportin the scorecutter, a carrier movable towar and away from the backin roller, 2. support on the carrier to pivotal y sustain the cutter holder, and a sprmg member anchored on the carrier an extending across the pivotal support into engagement with the cutter holder to thereby ress the score-cutter against the backing roilerwhen said spring member is g placed under tension by that movement of 10. A slittingldevice including: a backing roller, a rotata e score-cutter to coact therewith, a pivotally supported cutter holder aving an abutment located in the plane of slitting on that side of the score cutter that faces away from the backin roller, a carrier movable toward and away roin the backing roller, to pivotally support the cutter holder, and a sprlng member anchored on the carrier and extending across the pivotal support to engage said abutment to thereby. ress the score-cutter 'against the backing rol ler when roller, a carrier,

, shaft, a score-cutter mounte said spring member is placed under tension by that movement of the carrier which brings the score cutter into engagement. with the backin roller.

I1. 1 slitting device including: a backing roller,' a carrier movable toward and away from the backing roller, a cutter holder pivotally supported on the carrier, a shaft extending arallel to the pivotal support of the cutter older, spaced-apart bearings on the cutter holder to rotatabl support the intermediate the ends of the latter and in spaced relation to the bearings, steadying members, also mounted to rotate with the shaft, located intermediate the bearings and the score cutter and clamping opposite sides ,ofsa'id score-cutter, and a spring member to urge the cutter holder toward the backing roller.

12. mounting for a slitting member including: a cutter holder of sheet material,

spaced-apart bearin sockets formed in said cutter holder, a sha t rotatably mounted at each end in the bearing sockets of said cutter holder a slitting cutter mounted to rotate with the shaft, and steadying members also mounted to rotate with the shaft and clamping opposite sides of the slitting cutter;

' Signed at the city of New York, in the borough of Brookl 11, county of Killian/11d State of New Yor this 29 day of gust,

JAMES A. CAMERON on the shaft 

